Piston-casting machine



March 27, 1928. 1,663,693

4 F. L. FELTES PISTON CASTING moms Filed Nqv. so. 1925 5 Shuts-Shea? 1 gnuwntoz 'March 27, 1928. 1,663,693

F. L. FELT ES PISTON CASTING MACHINE Filed Nov. 30, 1925 5 Sheets-Shut 2 March 27, 1928. 1,663,693

F. L. FELTES PISTON CASTING MACHINE Filed Nov. 30. 1925 5 Sheets-Sheet, 3

attoznaqd March 27, 1928.

' F. L. FELTES PISTON CASTING momma Filed Nov. so, 1925 5 Sheets-Sheet 4 March 27, 1928. 1,663,693

F. L FELTES PISTON CASTING MACHINE Filed Nov. 30, 1925 5 Sheets-Sheet 5 Patented Mar. 27, 1928.

,UNITED STATES PATENT OFFICE.

FRANK L. FEL'IES, OF CLEVELAND, OHIO, ASSIGNOR, BY IvIESNE ASSIGNMENTS, TO

ALUMINUM COIVIPANY OF AMERICA, OF PITTSBURGH, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA.

PISTON-CASTING MACHINE.

Application filed November This invention relates to casting machines and particularly to that class of such devices utilized in casting or molding pistons and the like.

The main object of the invention is to provide a machine with a'plurality of cooperating mold and core parts forming a piston or like cavity and arranging, connecting and operating such parts in a manner such that an operator may readily assemble such parts to produce a cavity and core and thereafter remove such parts to release the cast or molded piston or other article.

The various features of the invention will be brought out in conjunction with the specilic embodiment set forth in the drawings, specification and claims.

Referring to the drawings, Fig. 1 is a front elevation of the machine; Fig. 2 is a side elevation; Fig. 3 is a section upon the line 33 of Fig. 1, looking in the direct-ion of the arrows indicated on that figure; Fig. 4c is a section upon the line 4-% of Fig. 1, looking in the direction of the arrows indicated inFig. 1; Fig. 5 is atop plan view of the main bed of the machine; Fig. (3 is an enlarged vertical sectional view through the main bed when the parts are assembled; Fig. 7 is a section upon the line 7-7 of Fig. 6, looking in the direction of the arrows; Fi 8 is an enlarged vertical sectional view showing the parts of the mold assembled; Fig. 9 is a section upon the line 99 of Fig. 8; Fig. 10 is a detailed section upon the line 1010 of Fig. 8; and Fig. 11 is a detailed section upon the line 1111, indicated in In the arrangement shown, 1 represents a main frame provided with a cross member 2 having bearings 3 therein and supporting a, shaft 4t having an upstanding handle 5. The upper end of the frame is provided with suitable guides 6 along the front and back for a purpose to be described. The frame is also provided with transverse guide members 7 forming vertical corner guides for an open plunger 8 which is adapted to move up and down in said corner guides. This hollow plungerhas a flat upper surface 9 interrupted at thecenter by a recess which provides a central centering boss for the piston, as will appear. This upper surface is the base or bottom of the mold. ,As

30, 1925. Serial No. 72,276.

receive a wrist pin bearing die or mold 16 v termed an insert. Each of the mold portions 11 is further provided with a flange 17, the left flange 17 being provided with a pair of cars 18 receiving a pin 19 upon which is pivoted the top plate 20 provided with a centrally disposed core receiving opening 21 for the core and arranged in alignment with the mold cavity, as will appear, and with a projection 22 overlying the right hand flange 17, as shown in Fig. 8.

This projection 22 is provided with a shaft 23 having a handle 24 at its upper end and a lower eccentric bevelled edge latch 25 adapted to engage a suitable keeper or hook 26 projecting upwardly from the right hand flange 17. By this arrangement when the two halves of the mold are assembled, as shown in Fig. 8, and top plate is in place, the latch may be tightened to draw the top and the-two halves of the mold all together and hold them in that position during the casting operation.

Each half mold portion or part is pro vided with a forwardly andupwardly extending portion 1% each of which is provided with a half spruo. channel 14leading to the cavity and a half riser channel 14".

Each of the bearing dies or inserts 16 is here shown as rectangular inshape so that. it lits a suitably shaped opening 15 and the wall of the opening either of the die, or the part 14-, is provided with suitable minute openings or passages 27, Fig. 8, for permitting the discharge of gas from the mold. The inner end of each end of the die is provided with the proper configuration to give the desired shape to the wrist pin bearing and the supports which extend to the walls of the piston. The outer end of each die may be provided with suitable flanges 28 adapted to be secured to the outside of the corresponding half mold portion 14E by suitable screws 29. Each die block or insert is further provided with a centrally disposed circular opening 30 for the reception of a. wrist pin bearing opening core pin or rod 31. These pins 31 move with the bearing dies and with the half mold portions, as will appear.

The core rods 31 must be changed from time to time as the iiiach'ine is used to pre vent over heating and this is accomplished mounting these rods in a turret 32 provided with a sham-:83 extending through a vertical bearing 34: in a transverse slide slidable laterally in the guide 6. Each shank 33 is provided with a suitable threaded end 36 for receiving a nut 37.

Eachturret may also be provided with a handle or knob 38 for rotating the same to bring a new pin in position. In order to position the turret, the main body 32 is provided below the rods with four recesses 39, one for each rod, and these recesses are en'- gaged by a projection 40 on a swinging latch lever 41 pivoted at 42 .and having a hook 423 at its opposite end engaged by a spring i l. The recesses 39 and projection 10 are tapered or. inclined so v that the turret may be ratche'ted around to bring a new pin in position to engage in the opening 30.

p The half molds 14- and their slides 13 together with the slide 35, carrying the turrets, are moved into and out of casting or molding position in a predetermined sequence and this is accoinplished by providing the slides 13 of the halfmolds with rods 45 projecting from the end of each slide and provided with checknu'ts 46 adapted to be engaged by a downwardly extending lug 47 carried by the corresponding turret slide Each turret slide is provided with a pair of cars 48 connected by links 49 to levers 50 pivoted intermediate their ends in the frame. These levers have their lower arms connected by links 51, in the case of the right hand levers 50, to upwardly extending crank arms 52 mounted upon. the shaft 4:, while the left hand levers are connected by links 53.130 downwardly extending crank arms 54; also secured to the shaft 4. By this arrangement it will be seen that when the shaft 4- is operated in the proper direction the turret slides and turrets will be moved to bring their rods into the openings 30 of the half molds and continued movement of the shaft il will pick up the half mold slides and the half molds and move all of these parts into assembled position over the hollow plunger 8. Int'he meantime the eccentriciQ raises the hollow plunger 8 up to a position whereit engages the bottoms of the two half molds thus completing the main mold assembly. In order to hold the half molds in this position, the latching mechanism already described is operated and the parts are locked in position.

The foregoing description has disposed of the main mold or cavity and it now remains to take up the main central core.

Extending upwardly from the main frame 1 is an upper frame 55 having a plurality of guide ways 56 preferably above the mold cavity formed by the mold parts already described. These guide ways receive a plurality of slide rods 57, live in number. The two outer slide rods 57 each carry an inwardly extending arm 58 provided with an outside core part 59 adapted to form a small peripheral portion of the main central core for that portion of the skirt of the piston just below the wrist pin bearing parts. These outside core portions can therefore move up and down freely above the wrist pin bearing dies. Each of these outside core portions 59 is preferably flat on its in- 1 side surface 60 and is engaged by the intermediate core portions to be described. The next pair of guide rods 57 are for these intermediate core portions and each. rod is pivotally connected to a lateral extension 61 inthe form of a lever of the first kind, one arm of the lever being provided with an operating handle 62 and the. other arm being provided with a downwardly extending intermediate core member or part 63. Each intermediate core member or part has a slightly inclined transverse face 64: and at its lower end is provided with a laterally ezrtending projection 65 for formi'ngtho vario'us configuration necessary for the inside of the top of the piston just above the wrist pin bearing part. Each of these intermediate core inen'ibers is further provided with an indentation, indicated at 66, for forming the inner part of the wrist pin bcarings. In assembling these intermediate core members or parts'in the cavity already formed, it is necessary that the lower projecting portions 65 swing laterally to pass the overhanging corresponding pin 31 and wrist pin bearing parts so that the lever mounting 61 at the top permits this swingign movement and the arrangement is such that these two intermediate members are lowered in succession, as will be described, the leftonc nioving down first. The operator moves the handle 62, if necessary, to cause the swinging movement so that this particular intermediate core member passes its ease-acting parts and passes to final position in the mold. Thereafter upon the descent of the right hand intermediate core member the operator swings this one in the proper manner t o "pass its pin 81 and other parts. By reason of the incline or taper oi the inner surfaces of these two intermediate core members, :1; v' shap ed opening is formed between j them and p it engaged by the central or main core member 6'? which is wedge Hill iii?

Hill

shaped and completes the peripheral configuration of the inside of the piston. This main core is mounted on the remaining central slide rod 57.

The proper progressive movement of the core members of this main or central core is accomplished by a plurality of properly shaped cams illustrated in Figs. 2, 3 and 4.

The cam 68 in Fig. 2 is provided with a portion 69 for receiving a roller 70 upon a lever 71 pivoted at 72 in the frame and connected by a link 73 to the outside of right hand slide rod 57 for the right hand outside core member or part. The inclination of the cam groove 69 is such that upon the rotation of the cam the parts are actuated and the right hand outside core member or part is moved downward. The groove 69 merges into a concentric groove 7 4 so that when this concentric portion of the groove. reaches the center of gravity no further downward movement of this core member or part results. This cam and all the others to be described, are mounted upon a shaft 75 supported in suitable bearings upon the frame.

The next adjacent intermediate core member 63 is actuated by a similar train of mechanism and similar cam and these cams may be set upon the shaft so that these parts. move together or the intermediate core member or part may follow the right hand outside core member or part. The left hand outside and intermediate core members are operated by similar mechanism employing a cam of the type shown in Fig. 4:, consisting of the main body portion 76 mounted upon the shaft 75 and having a concentric groove 77 which delays the downward movement of these two core members until the right hand pair previously described have reached assembled position when an eccentric groove 78 effects the proper movement of these two members to their assembled position. Thereafter a dwell at 79 delays further movement of these parts while the main or central core member 67 is moved down and this is accomplished by the cam shown in Fig. 3, wherein the body portion 80 is provided with a long dwell 81 and an eccentric groove 82. With the proper grooves and settings of these cams any desired progressive movement may be provided for the several parts of the core.

The shaft 75 may be actuated by any suitable means but it is here shown as operated by beveled pinions 83, 83 and a hand wheel 84. The shaft 75 may be provided with a suitable indicator 85 for showing the number of operations of the machine.

The entire core is heated when elevated. as shown in Fig. 1, by a suitable torch 86 and is cooled as desired by any suitable means such as a pan or receptacle 87 swingingly mounted upon suitable links 88 secured at 89 in the frame 55. This pan normally hangs to the rear out of the way of the parts, as shown in Fig. 2, but may be readily swung to the dotted line position where the core parts in upper assembly are emcrsed in water or other cooling medium in the pan 87.

The main mold parts are heated and a suitable arrangement is the provision of a torch 9O projecting its flame on the inside of the open plunger or mold base 8. The half mold members are heated by torches 91 which are so located that their flames play upon the parts when withdrawn from assembled position.

Suitable thermocouples 92 may be arranged or mounted in the several parts with indicators 93 for use in maintaining the parts of the mold at the proper temperature and assisting in the most effective operation of the machine.

In the use of the machine the operator applies the torches and brings the mold parts up to the proper temperature for ideal casting conditions. This may be done by overnight heating or by a suflicient heating just prior to use. The metal is then poured in through the sprue until the cavity and the riser are both filled, the gas escaping through the minute openings 27 and through similar openings provided on the walls of the main mold parts. IVhen the cavity is filled, the upper core structure is then withdrawn, the main mold unlocked, the core rods forming the piston bearings withdrawn and the remaining mold parts withdrawn until the casting is released and ready for removal. lVhen the casting is removed, the parts are reassembled in the manner already described and the machine is ready for another operation, it being obvious that the operator changes the wrist pin bearing core rods from time to time and cools the main core assembly by the use of the receptacle 87.

What I claim is:

1. In a piston casting machine, a frame, a mold having core openings therein, and a plurality of core parts operatively asso ciated with said mold for movement in suc cession in said core opening.

2. In a piston casting machine, a frame, a mold having a core opening therein, and a core operatively associated with said mold for movement into said core opening and comprising a turret provided with a plural ity of like core parts adapted for selective movement into said core opening.

3. In a piston casting machine, a frame, a plurality of separable mold parts each having a core opening, a movable core part for each opening, a movable core part support, a plurality of core parts carried thereby, and means for moving said core parts successively into the core openings.

4. In a piston casting machine, a frame,

a plurality of separable mold parts each having a. core opening, a movable core part for each opening, a core slide, a turret mounted upon said slide, and a plurality of like core parts carried by said turret and adapted to be brought selectively into mold opening position and into said core openings. V p

5. In a piston casting machine, a frame, a movable base member, a plurality of separable mold part-s above said base member, and means for moving all of said parts into a complete cavity forming assembly.

6. In a piston casting machine, a frame, a bottom cavity forming member, separable side cavity members slidable in said frame and having core openings, core parts slidably mounted in the frame, and an operating mechanism interconnected With all of said parts for moving said side members, said base member and said core parts into a complete cored cavity forming assembly.

7. In a piston molding machine, a frame, a cavity mold carried thereby and having a core opening, a multiple piece core, and means interconnecting said parts for progressively moving the pieces of said core into complete cored assembly Within said mold.

8. In a piston casting machine, a frame, a cavity mold having a core opening, a multiple part core, and means interconnecting said parts for supporting and successively assembling the pieces of said core in said. mold. V

9. In a piston casting machine, a frame, a cavity mold having a core opening, a multiple piece core, and means interconnecting said parts for supporting and successively assembling the pieces of said core in said mold and successively removing the core pieces from said mold.

10. In a piston casting machine, a frame, a cavity mold having a core opening, amultiple part core, and means for supporting and successively assembling the parts of said core insaid mold and comprising an operating member and timed actuating devices between it and the several core parts.

11. In a piston casting machine, a frame, a cavity mold having a core opening, supporting and operating device carried by said frame, and a core carried by said de vice and adapted to be assemble in the mold through the core opening.

12. In a piston casting machine, a future, a cavity moldhaving a core opening, multiple core supporting operating (\CVlC-QS, and movable core parts carried by said devices.

13. In a piston casting machine, a frame, a cavity mold having a core opening,mu1tiple core supporting operating devices, and

a core a swinging core parts carried by said devices.

14. In a piston casting machine, a frame, a cavity mold having a core opening, multiple core supporting operating devices, core parts fixedly mounted on some of said devices, and movable core devices movable on other of said devices for facilitating as sembly in the mold.

15. In a piston casting machine, a. frame, a cavity mold thereon having a core opening, a core suitably supported in the frame and movable into said cavity, and means for varying the temperature of the core.

16. In a piston casting machine, a frame, a cavity mold thereon having a core opening, a core suitably supported in the frame and movable into said cavity, and means for cooling the core.

17. in a piston casting machine, a frame, a cavity mold thereon havii'ig a core opening, a core suitably supported in the frame and movable into said cavity, and means carired by the frame for cooling said core and comprising a movable receptacle sup ported by the frame and adapted to be moved into emersing position With respect to the core. 7

In testimony whereof I hereby ati'ix my signature.

FRANK L. FELTES. 

